A Severe Flash Flood Warning is in effect for San Bernardino County, California, until 9:15 PM PDT on August 10, 2026, according to the National Weather Service (NWS).
The warning was issued at 7:22 PM PDT after Doppler radar indicated thunderstorms producing heavy rain. Up to 2 inches of rain have fallen, and flash flooding is ongoing or expected to begin shortly.
A Flash Flood Warning indicates that flooding is imminent or occurring, and may pose a threat to life and property. Areas prone to flooding, such as creeks, streams, urban areas, highways, streets, and underpasses, could experience life-threatening flash flooding.
In case of an emergency, dial 911. Follow the guidance of the NWS and local authorities. To stay safe, turn around and do not drown when encountering flooded roads, as most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. In hilly terrain, avoid low water crossings, which can be dangerous in heavy rain. Find an alternate route if necessary.
